A primary barrier preventing repetitive fast charging of Li-ion batteries is lithium metal plating at the graphite anode. One approach toward mitigating Li metal deposition is the deliberate modification of the graphite anode surface with materials demonstrating high overpotentials unfavorable for Li metal nucleation, such as Ni or Cu nanoscale films. This research explores Ni and Cu surface coatings at different areal loadings (3 or 11 μg cm-2) on the electrochemistry of graphite/LiNi0.6Mn0.2Co0.2O2 (NMC622) type Li-ion batteries. Extended galvanostatic cycling of control and metal-coated electrodes in graphite/NMC622 pouch cells are conducted under high rate conditions. Based on the overpotential of Li deposition on metal foil, both Ni and Cu treatments were anticipated to result in reduced lithium deposition. The higher metal film loadings of 11 μg cm-2 Ni- or Cu-coated electrodes exhibit the highest capacity retention after 500 cycles, with mean improvements of 8% and 9%, respectively, over uncoated graphite electrodes. Li plating quantified by X-ray diffraction indicates that the metal films effectively reduce the quantity of plated Li compared to untreated electrodes, with 11 μg cm-2 Cu providing the greatest benefit.
Tallman, Killian R., et al. "Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes." Journal of the Electrochemical Society (Online), vol. 167, no. 16, Nov. 2020. https://doi.org/10.1149/1945-7111/abcaba
Tallman, Killian R., Yan, Shan, Quilty, Calvin D., Abraham, Alyson, McCarthy, Alison H., Marschilok, Amy C., Takeuchi, Kenneth J., Takeuchi, Esther S., & Bock, David C. (2020). Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes. Journal of the Electrochemical Society (Online), 167(16). https://doi.org/10.1149/1945-7111/abcaba
Tallman, Killian R., Yan, Shan, Quilty, Calvin D., et al., "Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes," Journal of the Electrochemical Society (Online) 167, no. 16 (2020), https://doi.org/10.1149/1945-7111/abcaba
@article{osti_1756178,
author = {Tallman, Killian R. and Yan, Shan and Quilty, Calvin D. and Abraham, Alyson and McCarthy, Alison H. and Marschilok, Amy C. and Takeuchi, Kenneth J. and Takeuchi, Esther S. and Bock, David C.},
title = {Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes},
annote = {A primary barrier preventing repetitive fast charging of Li-ion batteries is lithium metal plating at the graphite anode. One approach toward mitigating Li metal deposition is the deliberate modification of the graphite anode surface with materials demonstrating high overpotentials unfavorable for Li metal nucleation, such as Ni or Cu nanoscale films. This research explores Ni and Cu surface coatings at different areal loadings (3 or 11 μg cm-2) on the electrochemistry of graphite/LiNi0.6Mn0.2Co0.2O2 (NMC622) type Li-ion batteries. Extended galvanostatic cycling of control and metal-coated electrodes in graphite/NMC622 pouch cells are conducted under high rate conditions. Based on the overpotential of Li deposition on metal foil, both Ni and Cu treatments were anticipated to result in reduced lithium deposition. The higher metal film loadings of 11 μg cm-2 Ni- or Cu-coated electrodes exhibit the highest capacity retention after 500 cycles, with mean improvements of 8% and 9%, respectively, over uncoated graphite electrodes. Li plating quantified by X-ray diffraction indicates that the metal films effectively reduce the quantity of plated Li compared to untreated electrodes, with 11 μg cm-2 Cu providing the greatest benefit.},
doi = {10.1149/1945-7111/abcaba},
url = {https://www.osti.gov/biblio/1756178},
journal = {Journal of the Electrochemical Society (Online)},
issn = {ISSN 1945-7111},
number = {16},
volume = {167},
place = {United States},
publisher = {IOP Publishing},
year = {2020},
month = {11}}
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1756178
Report Number(s):
BNL--220765-2020-JAAM
Journal Information:
Journal of the Electrochemical Society (Online), Journal Name: Journal of the Electrochemical Society (Online) Journal Issue: 16 Vol. 167; ISSN 1945-7111